High safety with low weight. Reassuring strength with feel-good comfort. Manufactured from high quality, strong ABS (Acrylonitrile-Buradiene-Styrene) material, the Concept is 20% lighter than most other helmets. Unique design, provides an extended nape, ensuring increased neck protection. Dry-Tech sweatband for maximum comfort, for extended periods of use. It satisfies all the electric insulation requirements of EN397 and ANSI Z 89 class E . it comes complete with a high security head harness, quick release chinstrap, comfortable terylene cradle and sweatband. Standard size is 51-63cm. Compliant with EN397 – 30℃ (Low temperature), 440V a.c. (Electric resistance). Available also with wheel ratchet option